// "Build Engine & Tools" Copyright (c) 1993-1997 Ken Silverman // Ken Silverman's official web site: "http://www.advsys.net/ken" // See the included license file "BUILDLIC.TXT" for license info. // // This file has been modified from Ken Silverman's original release // by Jonathon Fowler (jf@jonof.id.au) // by the EDuke32 team (development@voidpoint.com) #pragma once #ifndef ENGINE_PRIV_H #define ENGINE_PRIV_H #define MAXPERMS 512 #define MAXARTFILES_BASE 200 #define MAXARTFILES_TOTAL 220 #define MAXCLIPDIST 1024 // Uncomment to clear the screen before each top-level draw (classic only). // FIXME: doesn't work with mirrors. //#define ENGINE_CLEAR_SCREEN #ifdef YAX_ENABLE # define YAX_MAXDRAWS 8 #endif extern intptr_t asm1, asm2, asm3, asm4; extern int32_t globalx1, globaly2; extern uint16_t sqrtable[4096], shlookup[4096+256],sqrtable_old[2048]; static inline int32_t nsqrtasm(uint32_t a) { // JBF 20030901: This was a damn lot simpler to reverse engineer than // msqrtasm was. Really, it was just like simplifying an algebra equation. uint16_t c; if (a & 0xff000000) // test eax, 0xff000000 / jnz short over24 { c = shlookup[(a >> 24) + 4096]; // mov ebx, eax // over24: shr ebx, 24 // mov cx, word ptr shlookup[ebx*2+8192] } else { c = shlookup[a >> 12]; // mov ebx, eax // shr ebx, 12 // mov cx, word ptr shlookup[ebx*2] // jmp short under24 } a >>= c&0xff; // under24: shr eax, cl a = (a&0xffff0000)|(sqrtable[a]); // mov ax, word ptr sqrtable[eax*2] a >>= ((c&0xff00) >> 8); // mov cl, ch // shr eax, cl return a; } static inline int32_t getclipmask(int32_t a, int32_t b, int32_t c, int32_t d) { // Ken did this d = ((a<0)<<3) + ((b<0)<<2) + ((c<0)<<1) + (d<0); return (((d<<4)^0xf0)|d); } inline int32_t getkensmessagecrc(int32_t b) { UNREFERENCED_PARAMETER(b); return 0x56c764d4l; } inline int32_t ksqrtasm_old(int32_t n) { n = klabs(n); int shift; for (shift = 0; n >= 2048; n >>=2, shift++) { } return (sqrtable_old[n]<>10; } inline int32_t clip_nsqrtasm(int32_t n) { if (enginecompatibility_mode == ENGINECOMPATIBILITY_19950829) return ksqrtasm_old(n); return nsqrtasm(n); } extern int16_t thesector[MAXWALLSB], thewall[MAXWALLSB]; extern int16_t bunchfirst[MAXWALLSB], bunchlast[MAXWALLSB]; extern int16_t maskwall[MAXWALLSB], maskwallcnt; extern tspriteptr_t tspriteptr[MAXSPRITESONSCREEN + 1]; extern uint8_t* mirrorBuffer; extern int32_t xdimen, xdimenrecip, halfxdimen, xdimenscale, xdimscale, ydimen; extern float fxdimen; extern intptr_t frameoffset; extern int32_t globalposx, globalposy, globalposz, globalhoriz; extern fix16_t qglobalhoriz, qglobalang; extern float fglobalposx, fglobalposy, fglobalposz; extern int16_t globalang, globalcursectnum; extern int32_t globalpal, cosglobalang, singlobalang; extern int32_t cosviewingrangeglobalang, sinviewingrangeglobalang; extern int32_t globalhisibility, globalpisibility, globalcisibility; #ifdef USE_OPENGL extern int32_t globvis2, globalvisibility2, globalhisibility2, globalpisibility2, globalcisibility2; #endif extern int32_t globvis, globalvisibility; extern int32_t xyaspect; extern int32_t globalshade; extern int16_t globalpicnum; extern int32_t globalorientation; extern int16_t editstatus; extern int16_t searchit; extern int32_t searchx, searchy; extern int16_t searchsector, searchwall, searchstat; extern int16_t searchbottomwall, searchisbottom; extern char inpreparemirror; extern int16_t sectorborder[256]; extern int32_t qsetmode; extern int32_t hitallsprites; extern int32_t xb1[MAXWALLSB]; extern int32_t rx1[MAXWALLSB], ry1[MAXWALLSB]; extern int16_t bunchp2[MAXWALLSB]; extern int16_t numscans, numbunches; extern int32_t rxi[8], ryi[8]; extern void get_wallspr_points(uspriteptr_t spr, int32_t *x1, int32_t *x2, int32_t *y1, int32_t *y2); extern void get_floorspr_points(uspriteptr_t spr, int32_t px, int32_t py, int32_t *x1, int32_t *x2, int32_t *x3, int32_t *x4, int32_t *y1, int32_t *y2, int32_t *y3, int32_t *y4); // int32_t wallmost(int16_t *mostbuf, int32_t w, int32_t sectnum, char dastat); int32_t wallfront(int32_t l1, int32_t l2); void set_globalang(fix16_t const ang); int32_t animateoffs(int tilenum, int fakevar); static FORCE_INLINE int32_t bad_tspr(tspriteptr_t tspr) { // NOTE: tspr->owner >= MAXSPRITES (could be model) has to be handled by // caller. return (tspr->owner < 0 || (unsigned)tspr->picnum >= MAXTILES); } // // getpalookup (internal) // static FORCE_INLINE int32_t getpalookup(int32_t davis, int32_t dashade) { if (getpalookup_replace) return getpalookup_replace(davis, dashade); return min(max(dashade + (davis >> 8), 0), numshades - 1); } static FORCE_INLINE int32_t getpalookupsh(int32_t davis) { return getpalookup(davis, globalshade) << 8; } void dorotspr_handle_bit2(int32_t *sx, int32_t *sy, int32_t *z, int32_t dastat, int32_t cx1_plus_cx2, int32_t cy1_plus_cy2, int32_t *ret_yxaspect, int32_t *ret_xyaspect); ////// yax'y stuff ////// #ifdef USE_OPENGL extern void polymost_scansector(int32_t sectnum); #endif int32_t renderAddTsprite(int16_t z, int16_t sectnum); #ifdef YAX_ENABLE extern int32_t g_nodraw, scansector_retfast, scansector_collectsprites; extern int32_t yax_globallev, yax_globalbunch; extern int32_t yax_globalcf, yax_nomaskpass, yax_nomaskdidit; extern uint8_t haveymost[(YAX_MAXBUNCHES+7)>>3]; extern uint8_t yax_gotsector[(MAXSECTORS+7)>>3]; extern int32_t yax_polymostclearzbuffer; static FORCE_INLINE int32_t yax_isislandwall(int32_t line, int32_t cf) { return (yax_vnextsec(line, cf) >= 0); } #endif #ifdef YAX_DEBUG extern char m32_debugstr[64][128]; extern int32_t m32_numdebuglines; # define yaxdebug(fmt, ...) do { if (m32_numdebuglines<64) Bsnprintf(m32_debugstr[m32_numdebuglines++], 128, fmt, ##__VA_ARGS__); } while (0) # define yaxprintf(fmt, ...) do { initprintf(fmt, ##__VA_ARGS__); } while (0) #else # define yaxdebug(fmt, ...) # define yaxprintf(fmt, ...) #endif static FORCE_INLINE void setgotpic(int32_t tilenume) { gotpic[tilenume>>3] |= pow2char[tilenume&7]; } // Get properties of parallaxed sky to draw. // Returns: pointer to tile offset array. Sets-by-pointer the other three. static FORCE_INLINE const int8_t *getpsky(int32_t picnum, int32_t *dapyscale, int32_t *dapskybits, int32_t *dapyoffs, int32_t *daptileyscale) { psky_t const * const psky = &multipsky[getpskyidx(picnum)]; if (dapskybits) *dapskybits = (pskybits_override == -1 ? psky->lognumtiles : pskybits_override); if (dapyscale) *dapyscale = (parallaxyscale_override == 0 ? psky->horizfrac : parallaxyscale_override); if (dapyoffs) *dapyoffs = psky->yoffs + parallaxyoffs_override; if (daptileyscale) *daptileyscale = psky->yscale; return psky->tileofs; } static FORCE_INLINE void set_globalpos(int32_t const x, int32_t const y, int32_t const z) { globalposx = x, fglobalposx = (float)x; globalposy = y, fglobalposy = (float)y; globalposz = z, fglobalposz = (float)z; } template static FORCE_INLINE void tileUpdatePicnum(T * const tileptr, int const obj) { auto &tile = *tileptr; if (picanm[tile].sf & PICANM_ANIMTYPE_MASK) tile += animateoffs(tile, obj); if (((obj & 16384) == 16384) && (globalorientation & CSTAT_WALL_ROTATE_90) && RotTile(tile).newtile != -1) tile = RotTile(tile).newtile; } #endif /* ENGINE_PRIV_H */